Which object forms when a supergiant runs out of fuel?

Superginats are types of starts, characterzied by being the biggest starts.

When supergiants die (run out of hydrogen) the originate a supernova than they either become a neutron star or a black hole:

→ A black hole is a place in space, in timepsace to be more precise, that is most commonly known for its dark colour and for its drastical gravitational influence.

→ A neutron star is a very little but dense star, composed by neutrons and turns out to be the core of the dead supergiant.

Hope it helped,

BioTeacher101

hey bro i looked it up on google the structure of the eye-spot in euglena viridie, e. ehrenbergii, and phacus pyriyorme is not as franzé haa described it. the so-called “crystal body” and “lens bodies” were not found in any of the individuals of the species examined by me. as earlier observers have stated, the eye-spot consists simply of a mass of pigment granules arranged in a single layer, and probably embedded in a protoplasmic framework, but the latter could not be seen, and its presence was only inferred from the fact that the pigment granules must be held together in some way, thd the eye-spot as a whole is capable of expansion, and that the pigment granules can be separated from each other.

hope this   and an i get brainlsiest